2 * Copyright (c) 2017 SUSE LLC.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef included_vnet_sctp_h
16 #define included_vnet_sctp_h
18 #include <vnet/vnet.h>
19 #include <vnet/ip/ip.h>
20 #include <vnet/sctp/sctp_timer.h>
21 #include <vnet/sctp/sctp_packet.h>
22 #include <vnet/session/transport.h>
23 #include <vnet/session/session.h>
26 #define foreach_sctp_timer \
27 _(T1_INIT, "T1_INIT") \
28 _(T1_COOKIE, "T1_COOKIE") \
29 _(T2_SHUTDOWN, "T2_SHUTDOWN") \
30 _(T3_RXTX, "T3_RXTX") \
31 _(T4_HEARTBEAT, "T4_HB") \
32 _(T5_SHUTDOWN_GUARD, "T5_SHUTDOWN_GUARD")
34 typedef enum _sctp_timers
36 #define _(sym, str) SCTP_TIMER_##sym,
42 #define SCTP_TIMER_HANDLE_INVALID ((u32) ~0)
45 sctp_timer_to_string (u8 timer_id)
49 case SCTP_TIMER_T1_INIT:
50 return "SCTP_TIMER_T1_INIT";
51 case SCTP_TIMER_T1_COOKIE:
52 return "SCTP_TIMER_T1_COOKIE";
53 case SCTP_TIMER_T2_SHUTDOWN:
54 return "SCTP_TIMER_T2_SHUTDOWN";
55 case SCTP_TIMER_T3_RXTX:
56 return "SCTP_TIMER_T3_RXTX";
57 case SCTP_TIMER_T4_HEARTBEAT:
58 return "SCTP_TIMER_T4_HEARTBEAT";
59 case SCTP_TIMER_T5_SHUTDOWN_GUARD:
60 return "SCTP_TIMER_T5_SHUTDOWN_GUARD";
65 typedef enum _sctp_error
67 #define sctp_error(n,s) SCTP_ERROR_##n,
68 #include <vnet/sctp/sctp_error.def>
75 #define IS_T_BIT_SET(var) ((var) & (1))
76 #define IS_E_BIT_SET(var) ((var) & (1))
77 #define IS_B_BIT_SET(var) ((var) & (1<<1))
78 #define IS_U_BIT_SET(var) ((var) & (1<<2))
80 #define MAX_SCTP_CONNECTIONS 32
81 #define MAIN_SCTP_SUB_CONN_IDX 0
83 #if (VLIB_BUFFER_TRACE_TRAJECTORY)
84 #define sctp_trajectory_add_start(b, start) \
86 (*vlib_buffer_trace_trajectory_cb) (b, start); \
89 #define sctp_trajectory_add_start(b, start)
92 typedef struct _sctp_sub_connection
94 transport_connection_t connection; /**< Common transport data. First! */
95 void *parent; /**< Link to the parent-super connection */
97 u32 error_count; /**< The current error count for this destination. */
98 u32 error_threshold; /**< Current error threshold for this destination,
99 i.e. what value marks the destination down if error count reaches this value. */
100 u32 cwnd; /**< The current congestion window. */
101 u32 ssthresh; /**< The current ssthresh value. */
103 u32 rtt_ts; /**< USED to hold the timestamp of when the packet has been sent */
105 u32 RTO; /**< The current retransmission timeout value. */
106 u32 SRTT; /**< The current smoothed round-trip time. */
107 f32 RTTVAR; /**< The current RTT variation. */
109 u32 partially_acked_bytes; /**< The tracking method for increase of cwnd when in
110 congestion avoidance mode (see Section 7.2.2).*/
112 u8 state; /**< The current state of this destination, i.e., DOWN, UP, ALLOW-HB, NO-HEARTBEAT, etc. */
114 u16 PMTU; /**< The current known path MTU. */
116 u32 timers[SCTP_N_TIMERS]; /**< A timer used by each destination. */
118 u8 RTO_pending; /**< A flag used to track if one of the DATA chunks sent to
119 this address is currently being used to compute an RTT.
120 If this flag is 0, the next DATA chunk sent to this destination
121 should be used to compute an RTT and this flag should be set.
122 Every time the RTT calculation completes (i.e., the DATA chunk is SACK'd),
125 u32 last_time; /**< The time to which this destination was last sent a packet to.
126 This can be used to determine if a HEARTBEAT is needed. */
128 u8 unacknowledged_hb; /**< Used to track how many unacknowledged heartbeats we had;
129 If more than Max.Retransmit then connetion is considered unreachable. */
131 u8 is_retransmitting; /**< A flag (0 = no, 1 = yes) indicating whether the connection is retransmitting a previous packet */
133 } sctp_sub_connection_t;
137 u32 a_rwnd; /**< Maximum segment size advertised */
141 /* Useful macros to deal with the out_of_order_map (array of bit) */
142 #define SET_BIT(A,k) ( A[(k/32)] |= (1 << (k%32)) )
143 #define CLEAR_BIT(A,k) ( A[(k/32)] &= ~(1 << (k%32)) )
144 #define TEST_BIT(A,k) ( A[(k/32)] & (1 << (k%32)) )
147 _bytes_swap (void *pv, size_t n)
151 for (lo = 0, hi = n - 1; hi > lo; lo++, hi--)
159 #define ENDIANESS_SWAP(x) _bytes_swap(&x, sizeof(x));
161 #define MAX_INFLIGHT_PACKETS 128
162 #define MAX_ENQUEABLE_SACKS 2
164 /* This parameter indicates to the receiver how much increment in
165 * milliseconds the sender wishes the receiver to add to its default
168 #define SUGGESTED_COOKIE_LIFE_SPAN_INCREMENT 1000
170 typedef struct _sctp_connection
172 sctp_sub_connection_t sub_conn[MAX_SCTP_CONNECTIONS]; /**< Common transport data. First! */
174 u8 state; /**< SCTP state as per sctp_state_t */
175 u16 flags; /**< Chunk flag (see sctp_chunks_common_hdr_t) */
177 u32 local_tag; /**< INIT_TAG generated locally */
178 u32 remote_tag; /**< INIT_TAG generated by the remote peer */
180 u32 local_initial_tsn; /**< Initial TSN generated locally */
181 u32 remote_initial_tsn; /**< Initial TSN generated by the remote-peer */
183 u32 peer_cookie_life_span_increment;
185 u32 overall_err_count; /**< The overall association error count. */
186 u32 overall_err_treshold; /**< The threshold for this association that if the Overall Error Count
187 reaches will cause this association to be torn down. */
189 u32 peer_rwnd; /**< Current calculated value of the peer's rwnd. */
191 u32 next_tsn; /**< The next TSN number to be assigned to a new DATA chunk.
192 This is sent in the INIT or INIT ACK chunk to the peer
193 and incremented each time a DATA chunk is assigned a
194 TSN (normally just prior to transmit or during
197 u32 next_tsn_expected; /**< The next TSN number expected to be received. */
199 u32 last_rcvd_tsn; /**< This is the last TSN received in sequence. This value
200 is set initially by taking the peer's initial TSN,
201 received in the INIT or INIT ACK chunk, and
202 subtracting one from it. */
204 u32 out_of_order_map[MAX_INFLIGHT_PACKETS]; /**< An array of bits or bytes indicating which out-of-order
205 TSNs have been received (relative to the Last Rcvd TSN).
206 If no gaps exist, i.e., no out-of-order packets have been received,
207 this array will be set to all zero. */
209 u8 ack_state; /**< This flag indicates if the next received packet is set to be responded to with a SACK.
210 This is initialized to 0. When a packet is received it is incremented.
211 If this value reaches 2 or more, a SACK is sent and the value is reset to 0.
212 Note: This is used only when no DATA chunks are received out-of-order.
213 When DATA chunks are out-of-order, SACKs are not delayed (see Section 6). */
215 u32 a_rwnd; /** This value represents the dedicated buffer space, in number of bytes,
216 the sender of the INIT has reserved in association with this window.
217 During the life of the association, this buffer space SHOULD NOT be lessened
218 (i.e., dedicated buffers taken away from this association);
219 however, an endpoint MAY change the value of a_rwnd it sends in SACK chunks. */
221 u32 smallest_PMTU; /** The smallest PMTU discovered for all of the peer's transport addresses. */
223 u32 rcv_a_rwnd; /**< LOCAL max seg size that includes options. To be updated by congestion algos, etc. */
224 u32 snd_a_rwnd; /**< REMOTE max seg size that includes options. To be updated if peer pushes back on window, etc.*/
226 u8 overall_sending_status; /**< 0 indicates first fragment of a user message
227 1 indicates normal stream
228 2 indicates last fragment of a user message */
230 sctp_options_t rcv_opts;
231 sctp_options_t snd_opts;
233 u32 snd_hdr_length; /**< BASE HEADER LENGTH for the DATA chunk when sending */
234 u8 next_avail_sub_conn; /**< Represent the index of the next free slot in sub_conn */
238 typedef void (sctp_timer_expiration_handler) (u32 conn_index, u32 timer_id);
240 sctp_connection_t *sctp_connection_new (u8 thread_index);
241 void sctp_sub_connection_add_ip4 (u8 thread_index,
242 sctp_ipv4_addr_param_t * ipv4_addr);
243 void sctp_sub_connection_add_ip6 (u8 thread_index,
244 sctp_ipv6_addr_param_t * ipv6_addr);
245 void sctp_connection_close (sctp_connection_t * sctp_conn);
246 void sctp_connection_cleanup (sctp_connection_t * sctp_conn);
247 void sctp_connection_del (sctp_connection_t * sctp_conn);
249 u32 sctp_push_header (transport_connection_t * tconn, vlib_buffer_t * b);
250 void sctp_send_init (sctp_connection_t * sctp_conn);
251 void sctp_send_shutdown (sctp_connection_t * sctp_conn);
252 void sctp_send_shutdown_ack (sctp_connection_t * sctp_conn,
254 void sctp_send_shutdown_complete (sctp_connection_t * sctp_conn);
255 void sctp_send_heartbeat (sctp_connection_t * sctp_conn);
256 void sctp_flush_frame_to_output (vlib_main_t * vm, u8 thread_index,
258 void sctp_flush_frames_to_output (u8 thread_index);
259 void sctp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
261 format_function_t format_sctp_state;
263 u8 *format_sctp_connection_id (u8 * s, va_list * args);
264 u8 *format_sctp_connection (u8 * s, va_list * args);
265 u8 *format_sctp_scoreboard (u8 * s, va_list * args);
266 u8 *format_sctp_header (u8 * s, va_list * args);
267 u8 *format_sctp_tx_trace (u8 * s, va_list * args);
269 clib_error_t *sctp_init (vlib_main_t * vm);
270 void sctp_connection_timers_init (sctp_connection_t * tc);
271 void sctp_connection_timers_reset (sctp_connection_t * tc);
272 void sctp_init_snd_vars (sctp_connection_t * tc);
273 void sctp_init_mss (sctp_connection_t * tc);
275 void sctp_prepare_initack_chunk (sctp_connection_t * ts, vlib_buffer_t * b,
276 ip4_address_t * ip4_addr,
277 ip6_address_t * ip6_addr);
278 void sctp_prepare_cookie_echo_chunk (sctp_connection_t * tc,
280 sctp_state_cookie_param_t * sc);
281 void sctp_prepare_cookie_ack_chunk (sctp_connection_t * tc,
283 void sctp_prepare_sack_chunk (sctp_connection_t * tc, vlib_buffer_t * b);
284 void sctp_prepare_heartbeat_ack_chunk (sctp_connection_t * sctp_conn,
287 u16 sctp_check_outstanding_data_chunks (sctp_connection_t * tc);
289 #define IP_PROTOCOL_SCTP 132
291 /** SSCTP FSM state definitions as per RFC4960. */
292 #define foreach_sctp_fsm_state \
293 _(CLOSED, "CLOSED") \
294 _(COOKIE_WAIT, "COOKIE_WAIT") \
295 _(COOKIE_ECHOED, "COOKIE_ECHOED") \
296 _(ESTABLISHED, "ESTABLISHED") \
297 _(SHUTDOWN_PENDING, "SHUTDOWN_PENDING") \
298 _(SHUTDOWN_SENT, "SHUTDOWN_SENT") \
299 _(SHUTDOWN_RECEIVED, "SHUTDOWN_RECEIVED") \
300 _(SHUTDOWN_ACK_SENT, "SHUTDOWN_ACK_SENT")
302 typedef enum _sctp_state
304 #define _(sym, str) SCTP_STATE_##sym,
305 foreach_sctp_fsm_state
311 sctp_state_to_string (u8 state)
315 case SCTP_STATE_CLOSED:
316 return "SCTP_STATE_CLOSED";
317 case SCTP_STATE_COOKIE_WAIT:
318 return "SCTP_STATE_COOKIE_WAIT";
319 case SCTP_STATE_COOKIE_ECHOED:
320 return "SCTP_STATE_COOKIE_ECHOED";
321 case SCTP_STATE_ESTABLISHED:
322 return "SCTP_STATE_ESTABLISHED";
323 case SCTP_STATE_SHUTDOWN_PENDING:
324 return "SCTP_STATE_SHUTDOWN_PENDING";
325 case SCTP_STATE_SHUTDOWN_SENT:
326 return "SCTP_STATE_SHUTDOWN_SENT";
327 case SCTP_STATE_SHUTDOWN_RECEIVED:
328 return "SCTP_STATE_SHUTDOWN_RECEIVED";
329 case SCTP_STATE_SHUTDOWN_ACK_SENT:
330 return "SCTP_STATE_SHUTDOWN_ACK_SENT";
336 sctp_chunk_to_string (u8 type)
351 return "HEARTBEAT_ACK";
357 return "SHUTDOWN_ACK";
358 case OPERATION_ERROR:
359 return "OPERATION_ERROR";
361 return "COOKIE_ECHO";
368 case SHUTDOWN_COMPLETE:
369 return "SHUTDOWN_COMPLETE";
375 sctp_optparam_type_to_string (u8 type)
379 case SCTP_IPV4_ADDRESS_TYPE:
380 return "SCTP_IPV4_ADDRESS_TYPE";
381 case SCTP_IPV6_ADDRESS_TYPE:
382 return "SCTP_IPV6_ADDRESS_TYPE";
383 case SCTP_STATE_COOKIE_TYPE:
384 return "SCTP_STATE_COOKIE_TYPE";
385 case SCTP_UNRECOGNIZED_TYPE:
386 return "SCTP_UNRECOGNIZED_TYPE";
387 case SCTP_COOKIE_PRESERVATIVE_TYPE:
388 return "SCTP_COOKIE_PRESERVATIVE_TYPE";
389 case SCTP_HOSTNAME_ADDRESS_TYPE:
390 return "SCTP_HOSTNAME_ADDRESS_TYPE";
391 case SCTP_SUPPORTED_ADDRESS_TYPES:
392 return "SCTP_SUPPORTED_ADDRESS_TYPES";
397 #define SCTP_TICK 0.001 /**< SCTP tick period (s) */
398 #define SHZ (u32) (1/SCTP_TICK) /**< SCTP tick frequency */
399 #define SCTP_TSTAMP_RESOLUTION SCTP_TICK /**< Time stamp resolution */
401 /* As per RFC4960, page 83 */
402 #define SCTP_RTO_INIT 3 * SHZ /* 3 seconds */
403 #define SCTP_RTO_MIN 1 * SHZ /* 1 second */
404 #define SCTP_RTO_MAX 60 * SHZ /* 60 seconds */
405 #define SCTP_RTO_BURST 4
406 #define SCTP_RTO_ALPHA 1/8
407 #define SCTP_RTO_BETA 1/4
408 #define SCTP_VALID_COOKIE_LIFE 60 * SHZ /* 60 seconds */
409 #define SCTP_ASSOCIATION_MAX_RETRANS 10
411 #define SCTP_TO_TIMER_TICK SCTP_TICK*10 /* Period for converting from SCTP_TICK */
413 typedef struct _sctp_lookup_dispatch
416 } sctp_lookup_dispatch_t;
418 typedef struct _sctp_main
420 /* Per-worker thread SCTP connection pools */
421 sctp_connection_t **connections;
423 /* Pool of listeners. */
424 sctp_connection_t *listener_pool;
426 /** Dispatch table by state and flags */
427 sctp_lookup_dispatch_t dispatch_table[SCTP_N_STATES][64];
429 u8 log2_tstamp_clocks_per_tick;
430 f64 tstamp_ticks_per_clock;
433 /** per-worker tx buffer free lists */
435 /** per-worker tx frames to SCTP 4/6 output nodes */
436 vlib_frame_t **tx_frames[2];
437 /** per-worker tx frames to ip 4/6 lookup nodes */
438 vlib_frame_t **ip_lookup_tx_frames[2];
440 /* Per worker-thread timer wheel for connections timers */
441 tw_timer_wheel_16t_2w_512sl_t *timer_wheels;
443 /* Pool of half-open connections on which we've sent a SYN */
444 sctp_connection_t *half_open_connections;
445 clib_spinlock_t half_open_lock;
447 /* TODO: Congestion control algorithms registered */
448 /* sctp_cc_algorithm_t *cc_algos; */
450 /* Flag that indicates if stack is on or off */
453 /** Number of preallocated connections */
454 u32 preallocated_connections;
456 /** Transport table (preallocation) size parameters */
457 u32 local_endpoints_table_memory;
458 u32 local_endpoints_table_buckets;
460 /** Vectors of src addresses. Optional unless one needs > 63K active-opens */
461 ip4_address_t *ip4_src_addresses;
462 u32 last_v4_address_rotor;
463 u32 last_v6_address_rotor;
464 ip6_address_t *ip6_src_addresses;
466 /** vlib buffer size */
467 u32 bytes_per_buffer;
474 extern sctp_main_t sctp_main;
475 extern vlib_node_registration_t sctp4_input_node;
476 extern vlib_node_registration_t sctp6_input_node;
477 extern vlib_node_registration_t sctp4_output_node;
478 extern vlib_node_registration_t sctp6_output_node;
480 always_inline sctp_main_t *
481 vnet_get_sctp_main ()
486 always_inline sctp_header_t *
487 sctp_buffer_hdr (vlib_buffer_t * b)
489 ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE);
490 return (sctp_header_t *) (b->data + b->current_data
491 + vnet_buffer (b)->sctp.hdr_offset);
494 clib_error_t *vnet_sctp_enable_disable (vlib_main_t * vm, u8 is_en);
496 always_inline sctp_connection_t *
497 sctp_half_open_connection_get (u32 conn_index)
499 sctp_connection_t *tc = 0;
500 clib_spinlock_lock_if_init (&sctp_main.half_open_lock);
501 if (!pool_is_free_index (sctp_main.half_open_connections, conn_index))
502 tc = pool_elt_at_index (sctp_main.half_open_connections, conn_index);
503 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].parent = tc;
504 clib_spinlock_unlock_if_init (&sctp_main.half_open_lock);
509 * Cleanup half-open connection
513 sctp_half_open_connection_del (sctp_connection_t * tc)
515 sctp_main_t *tm = vnet_get_sctp_main ();
516 clib_spinlock_lock_if_init (&tm->half_open_lock);
517 pool_put_index (tm->half_open_connections,
518 tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_c_index);
520 memset (tc, 0xFA, sizeof (*tc));
521 clib_spinlock_unlock_if_init (&tm->half_open_lock);
525 sctp_set_time_now (u32 thread_index)
527 sctp_main.time_now[thread_index] = clib_cpu_time_now ()
528 * sctp_main.tstamp_ticks_per_clock;
529 return sctp_main.time_now[thread_index];
533 sctp_timer_set (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
536 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
537 vlib_get_thread_index ());
538 ASSERT (tc->sub_conn[conn_idx].timers[timer_id] ==
539 SCTP_TIMER_HANDLE_INVALID);
541 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
542 sub->timers[timer_id] =
543 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
544 sub->c_c_index, timer_id, interval);
548 sctp_timer_reset (sctp_connection_t * tc, u8 conn_idx, u8 timer_id)
550 ASSERT (tc->sub_conn[conn_idx].c_thread_index == vlib_get_thread_index ());
551 if (tc->sub_conn[conn_idx].timers[timer_id] == SCTP_TIMER_HANDLE_INVALID)
554 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
556 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
557 sub->timers[timer_id]);
558 sub->timers[timer_id] = SCTP_TIMER_HANDLE_INVALID;
562 * Try to cleanup half-open connection
564 * If called from a thread that doesn't own tc, the call won't have any
567 * @param tc - connection to be cleaned up
568 * @return non-zero if cleanup failed.
571 sctp_half_open_connection_cleanup (sctp_connection_t * tc)
573 /* Make sure this is the owning thread */
574 if (tc->sub_conn[MAIN_SCTP_SUB_CONN_IDX].c_thread_index !=
575 vlib_get_thread_index ())
577 sctp_timer_reset (tc, MAIN_SCTP_SUB_CONN_IDX, SCTP_TIMER_T1_INIT);
578 sctp_half_open_connection_del (tc);
585 return sizeof (sctp_header_t);
588 always_inline sctp_connection_t *
589 sctp_get_connection_from_transport (transport_connection_t * tconn)
591 ASSERT (tconn != NULL);
593 sctp_sub_connection_t *sub = (sctp_sub_connection_t *) tconn;
596 SCTP_ADV_DBG ("sub == NULL");
597 if (sub->parent == NULL)
598 SCTP_ADV_DBG ("sub->parent == NULL");
600 return (sctp_connection_t *) sub->parent;
606 return sctp_main.time_now[vlib_get_thread_index ()];
609 #define ABS(x) ((x) > 0) ? (x) : -(x);
612 sctp_calculate_rto (sctp_connection_t * sctp_conn, u8 conn_idx)
614 /* See RFC4960, 6.3.1. RTO Calculation */
617 u32 now = sctp_time_now ();
618 u32 prev_ts = sctp_conn->sub_conn[conn_idx].rtt_ts;
619 u32 R = prev_ts - now;
621 if (sctp_conn->sub_conn[conn_idx].RTO == 0) // C1: Let's initialize our RTO
623 sctp_conn->sub_conn[conn_idx].RTO = SCTP_RTO_MIN;
627 if (sctp_conn->sub_conn[conn_idx].RTO == SCTP_RTO_MIN && sctp_conn->sub_conn[conn_idx].SRTT == 0) // C2: First RTT calculation
629 sctp_conn->sub_conn[conn_idx].SRTT = R;
633 RTTVAR = 100e-3; /* 100 ms */
635 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
637 else // C3: RTT already exists; let's recalculate
639 RTTVAR = (1 - SCTP_RTO_BETA) * sctp_conn->sub_conn[conn_idx].RTTVAR +
640 SCTP_RTO_BETA * ABS (sctp_conn->sub_conn[conn_idx].SRTT - R);
643 RTTVAR = 100e-3; /* 100 ms */
645 sctp_conn->sub_conn[conn_idx].RTTVAR = RTTVAR;
647 sctp_conn->sub_conn[conn_idx].SRTT =
648 (1 - SCTP_RTO_ALPHA) * sctp_conn->sub_conn[conn_idx].SRTT +
653 sctp_conn->sub_conn[conn_idx].SRTT +
654 4 * sctp_conn->sub_conn[conn_idx].RTTVAR;
655 if (RTO < SCTP_RTO_MIN) // C6
658 if (RTO > SCTP_RTO_MAX) // C7
661 sctp_conn->sub_conn[conn_idx].RTO = RTO;
665 sctp_timer_update (sctp_connection_t * tc, u8 conn_idx, u8 timer_id,
668 ASSERT (tc->sub_conn[conn_idx].connection.thread_index ==
669 vlib_get_thread_index ());
670 sctp_sub_connection_t *sub = &tc->sub_conn[conn_idx];
672 if (tc->sub_conn[conn_idx].timers[timer_id] != SCTP_TIMER_HANDLE_INVALID)
673 tw_timer_stop_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
674 sub->timers[timer_id]);
676 tc->sub_conn[conn_idx].timers[timer_id] =
677 tw_timer_start_16t_2w_512sl (&sctp_main.timer_wheels[sub->c_thread_index],
678 sub->c_c_index, timer_id, interval);
681 always_inline sctp_connection_t *
682 sctp_listener_get (u32 tli)
684 return pool_elt_at_index (sctp_main.listener_pool, tli);
689 always_inline sctp_connection_t *
690 sctp_connection_get (u32 conn_index, u32 thread_index)
693 (pool_is_free_index (sctp_main.connections[thread_index], conn_index)))
695 return pool_elt_at_index (sctp_main.connections[thread_index], conn_index);
699 sctp_pick_conn_idx_on_chunk (sctp_chunk_type chunk_type)
701 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
714 case OPERATION_ERROR:
719 case SHUTDOWN_COMPLETE:
720 idx = MAIN_SCTP_SUB_CONN_IDX;
726 sctp_pick_conn_idx_on_state (sctp_state_t state)
728 u8 idx = MAIN_SCTP_SUB_CONN_IDX;
732 case SCTP_STATE_CLOSED:
733 case SCTP_STATE_COOKIE_WAIT:
734 case SCTP_STATE_COOKIE_ECHOED:
735 case SCTP_STATE_ESTABLISHED:
736 case SCTP_STATE_SHUTDOWN_PENDING:
737 case SCTP_STATE_SHUTDOWN_SENT:
738 case SCTP_STATE_SHUTDOWN_RECEIVED:
739 case SCTP_STATE_SHUTDOWN_ACK_SENT:
740 idx = MAIN_SCTP_SUB_CONN_IDX;
742 idx = MAIN_SCTP_SUB_CONN_IDX;
748 * Push SCTP header to buffer
750 * @param vm - vlib_main
751 * @param b - buffer to write the header to
752 * @param sp_net - source port net order
753 * @param dp_net - destination port net order
754 * @param sctp_hdr_opts_len - header and options length in bytes
756 * @return - pointer to start of SCTP header
759 vlib_buffer_push_sctp_net_order (vlib_buffer_t * b, u16 sp, u16 dp,
760 u8 sctp_hdr_opts_len)
762 sctp_full_hdr_t *full_hdr;
764 full_hdr = vlib_buffer_push_uninit (b, sctp_hdr_opts_len);
766 full_hdr->hdr.src_port = sp;
767 full_hdr->hdr.dst_port = dp;
768 full_hdr->hdr.checksum = 0;
773 * Push SCTP header to buffer
775 * @param b - buffer to write the header to
776 * @param sp_net - source port net order
777 * @param dp_net - destination port net order
778 * @param sctp_hdr_opts_len - header and options length in bytes
780 * @return - pointer to start of SCTP header
783 vlib_buffer_push_sctp (vlib_buffer_t * b, u16 sp_net, u16 dp_net,
784 u8 sctp_hdr_opts_len)
786 return vlib_buffer_push_sctp_net_order (b, sp_net, dp_net,
791 * fd.io coding-style-patch-verification: ON
794 * eval: (c-set-style "gnu")